{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2013:3LLCPUVCH7TI3M6YARFLB6KOB7","short_pith_number":"pith:3LLCPUVC","schema_version":"1.0","canonical_sha256":"dad627d2a23fe68db3d8044ab0f94e0fe9e59298f850914ca0ff3d0740833a8b","source":{"kind":"arxiv","id":"1304.4109","version":1},"attestation_state":"computed","paper":{"title":"Optical and X-ray Properties of CAL 83: I. Quasi-periodic Optical and Supersoft Variability","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"A. F. Rajoelimanana, A. Odendaal, A. Udalski, P. A. Charles, P.J. Meintjes","submitted_at":"2013-04-15T14:19:57Z","abstract_excerpt":"We have studied the long-term (~ years) temporal variability of the prototype supersoft X-ray source (SSS) CAL 83 in the LMC, using data from the MACHO and OGLE projects. The CAL 83 light curve exhibits dramatic brightness changes of ~1 mag on timescales of ~450 days, and spends typically ~200 days in the optical low state. Combined with archival XMM-Newton X-ray observations these represent the most extensive X-ray/optical study to date of this system, and reveal in much greater detail that the X-ray light curve is anti-correlated with the optical behaviour. This is remarkably similar to the "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1304.4109","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-04-15T14:19:57Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"cf6f83a9b94795ccd0d6494886e6d8820f4d60e5da743fbfd4b5a46a12ea25dc","abstract_canon_sha256":"51878879538fd764a3afe48367c806c3ee0e8df986022b5a3644ce7b3e1c651f"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:50:32.754744Z","signature_b64":"MRHwQStNUSuHxdJt7qmTtQl6YYz5pEwGy9xMKZZtVf2b5N7meHfxouDUu00aRCADlyHsgUIkLD/aIPIbVgkYAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dad627d2a23fe68db3d8044ab0f94e0fe9e59298f850914ca0ff3d0740833a8b","last_reissued_at":"2026-05-18T01:50:32.754204Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:50:32.754204Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Optical and X-ray Properties of CAL 83: I. Quasi-periodic Optical and Supersoft Variability","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"A. F. Rajoelimanana, A. Odendaal, A. Udalski, P. A. Charles, P.J. Meintjes","submitted_at":"2013-04-15T14:19:57Z","abstract_excerpt":"We have studied the long-term (~ years) temporal variability of the prototype supersoft X-ray source (SSS) CAL 83 in the LMC, using data from the MACHO and OGLE projects. The CAL 83 light curve exhibits dramatic brightness changes of ~1 mag on timescales of ~450 days, and spends typically ~200 days in the optical low state. Combined with archival XMM-Newton X-ray observations these represent the most extensive X-ray/optical study to date of this system, and reveal in much greater detail that the X-ray light curve is anti-correlated with the optical behaviour. This is remarkably similar to the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.4109","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"1304.4109","created_at":"2026-05-18T01:50:32.754284+00:00"},{"alias_kind":"arxiv_version","alias_value":"1304.4109v1","created_at":"2026-05-18T01:50:32.754284+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1304.4109","created_at":"2026-05-18T01:50:32.754284+00:00"},{"alias_kind":"pith_short_12","alias_value":"3LLCPUVCH7TI","created_at":"2026-05-18T12:27:32.513160+00:00"},{"alias_kind":"pith_short_16","alias_value":"3LLCPUVCH7TI3M6Y","created_at":"2026-05-18T12:27:32.513160+00:00"},{"alias_kind":"pith_short_8","alias_value":"3LLCPUVC","created_at":"2026-05-18T12:27:32.513160+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/3LLCPUVCH7TI3M6YARFLB6KOB7","json":"https://pith.science/pith/3LLCPUVCH7TI3M6YARFLB6KOB7.json","graph_json":"https://pith.science/api/pith-number/3LLCPUVCH7TI3M6YARFLB6KOB7/graph.json","events_json":"https://pith.science/api/pith-number/3LLCPUVCH7TI3M6YARFLB6KOB7/events.json","paper":"https://pith.science/paper/3LLCPUVC"},"agent_actions":{"view_html":"https://pith.science/pith/3LLCPUVCH7TI3M6YARFLB6KOB7","download_json":"https://pith.science/pith/3LLCPUVCH7TI3M6YARFLB6KOB7.json","view_paper":"https://pith.science/paper/3LLCPUVC","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1304.4109&json=true","fetch_graph":"https://pith.science/api/pith-number/3LLCPUVCH7TI3M6YARFLB6KOB7/graph.json","fetch_events":"https://pith.science/api/pith-number/3LLCPUVCH7TI3M6YARFLB6KOB7/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/3LLCPUVCH7TI3M6YARFLB6KOB7/action/timestamp_anchor","attest_storage":"https://pith.science/pith/3LLCPUVCH7TI3M6YARFLB6KOB7/action/storage_attestation","attest_author":"https://pith.science/pith/3LLCPUVCH7TI3M6YARFLB6KOB7/action/author_attestation","sign_citation":"https://pith.science/pith/3LLCPUVCH7TI3M6YARFLB6KOB7/action/citation_signature","submit_replication":"https://pith.science/pith/3LLCPUVCH7TI3M6YARFLB6KOB7/action/replication_record"}},"created_at":"2026-05-18T01:50:32.754284+00:00","updated_at":"2026-05-18T01:50:32.754284+00:00"}